Engine charger



Feb. 7, 1933- o. H. SPENCER y 1,896,256

' K ENGINE CHARGER -Filed March 9, 1929 2 sheet'sneet l Inventor Feb. 7,1933. o. H. SPENCER 1,896,256

ENGINE CHARGER Filed March 9, 1929 2 Sheets-Sheet 2 l Venter lPatentedFeb. 7, 1933 OWEN H. SPENCER, OF INDIANAPOLIS, INDIANA.

ENGINE CHARGER Application med March 9. 1929. Serial No. 345,811.-`

"This invention relates to an engine superclirger and is particularlyadapted for use in connection with internal combustion enines and theprime feature of the invention 1s the provision of means for directing ablast of air over parts of an engine for cooling the same or into thecylinders of the env gine for cooling purposes and supplying anincreased amount of oxygen to the fuel mixture lfor enriching the same,as well as for introducing a gaseous or liquid fuel to an explosiveengine.

A feature of the yinvention is the prov1s1o `of a spider and a housingtherefor, the s ider being eccentrically mounted within the ousing andhaving a plurality of radiating slots transversely7 therethru.

A further feature of the invention is the rovisio'n of a blade for eachslot, said blades ing preferably constructed of fabric, reenforcedbakelite or similar materiali the pores of which are impregnated withgraphite or the like.

A further feature of the invention is the provision of means for causingsaid blades to positively travel lengthwise of said slots whereby theouter ends of the blades will con-l stantly contact with the innerperipheral wall of the housing. t

A further feature of the invention 1s 1n so constructing the bladeshifting means that the bearing face thereof may readily assume aposition at an angle to the base of the blades, due to thediiferencebetween the path of radial travel of the shifting means andthat of the spider.

A further feature of the ,invention is the provision of springcontrolled means for retaining a constant contact between the blades andthe shifting means therefor and in a manner to direct outer pressureagainst one member and inward' pressure against the' other.

Other objects and advantages will be hereinafter more fully set forthand pointed out in the accompanying specifications.

In the accompanying drawings Which are made a part of this application,

Figure l is a transverse vertical section of the supercharger with.parts broken out.

Figure 2 is a sectional view as seen in the proximity of line 2 2; Fig.1.

Figure `3 is a detail perspective view of one of the blades removed fromthe spider.

Figure 4is an enlarged sectional view thru- 55 a ortion of one of thebla-des.

igure 5 is a plan view of one of the blade shifting members, and,

Fi re 6 is a -cross sectional view thereof. Reit;

rring to the drawings in which similar reference `numerals designatecorresponding parts thruout the several views, l indicates the forwardend of a crank case ofV an engine, thru which extends a driving shaft 2and to the end of which is casingB, as is usual. Y

Mounted-forwardly of the gear casing 3 and forming the forward wallthereof, is a housing 4, in ,which is rotatably mounted i a spider 5,said spiderbeing concentricallyv 70.

mounted on the shaft 2,'while the housing 4 is eccentrically mountedwithrespectto said shaft and spider," The face walls of the housings 4and 3 have circular channels 6 therein, in which are placed races 7 ofrela- 75 tively harder material than that of the housing, 'said racesbeing concentric with the housing 4.

Cooperating with the races 7 are cross bars 8` said bars having integralshoes 9 at the 80 .i

ends thereof, which lit and slide in said races and are curvedcoincident to the curvature of the races. Fitting betWeen'the cross bars8 4 and the peripheral wall of the housing 4 are a plurality of blades1'0, which enter and slide 85 longitudinally in grootves V11 formedtransversely thru the spider 5,at intervals, said grooves extending frompoints adjacent the axis of said spider to theouter edges thereof sothat the outer ends of the blades may contact with the inner face of theperipheral Wall of the housing 4 and the lateral edges thereof with theface walls of the housing.

The blades 10 are preferably formed ofbakelite or similar material, thepores of which are impregnated with graphite or the like, thus producinga surface which v,will not become Worn by frictional contact with theWalls of the housing 4. As the bodies of thecross bars 8 attachedaf'ygearZ 65 pass thru 10o 'the' fooves 11 and move inwardlyv and outwary therein, and as the travel of the cross i bars is eccentric to theaxis of the spider 5,

the cross bars will be given a slight rocking vmovement as they travelaround the shaft 2,

the corner edges 12 of the cross bars are rounded as best shown in Fig.6, thus r- ,mitting a suicient rotating movement o the cross barswithinthe ooves 11, to compensate for the change o position of the crossbars It has been found in actual practice that the cross bars 8 have atendency to crowd against one face of the grooves 11 due to the vns`drag' of the shoes as they travel through the channels and move out ofdirect alinement with theblades cooperating therewith and it has beenfound that by roundingthe edges 'I of the cross bars 8, so that eachside edge will represent the aro of a circle, some portion of veach edgeof the cross bar will always bear vidai with one-or more bores 13 intoeac of which is disposed a plunger 14 a sprin V15 being also positionedwithin said bore an exerting constant outward pressure against theplunger. The outer end 16 of the plun r14 is refer-ably substantiallyinted so t at it wil engage in thetapere recesses 16A in the cooperatingcross bar 8 and press firmly thereagainst at whatever angle the face ofthe cross bar may be to the trend of the cooperatin'g blade 10.. Thetapered recesses 16A extend substantially half waythru the cross bars 8so that the points 16 of the plungers 14 will always rest a inst thelowermost portion of the tapere recesses 16A at whatever angle the crossbars 8 may be turned to the longitudinal plane of plungers 14. The angleof the walls of the recesses 16A is less acute than the angle of theends 16 so that at no time will the face of the pointed end 16 contactwith the inclined walls of the recesses 16A other than at the extremepoints thereof.

The'contact point of the recesses 16A. with the plungers 14 issubstantially coincident to the axial lineof-the cross bars 8, aboutwhich the round edegs thereof are developed for contact with the slots11.

The tension of the spring 15 is such that the blade will be held morelor less firmly against the peripheral wall of the housing 4 and making asubstantially airtight joint therebetween.

Connected with the forward wall of the housing 4 is an intake port 17andan exhaust port 18, the opening of the said intake port at itsentrance into the housing being substantially crescent shaped or taperedfrom its central part to more or less finer points at its ends, whilethe exhaust port at its en Lacasse Y trance into the housing has a fullvolume at one end and tapers to a finer point at its lower end. Byarranging the intake port 17 in substantially' crescent shape, the airis gradually gathered up by the blades l0 and likewise gradually cutoil, while the port 18 is so arranged that the enlarged end thereof isrst encountered, allowing the accumulats ed air between the pairs ofblades to discharge raiidly and gradually cut 0H.

he outer or contacting ends 19 of the blades 10 are preferably sochamfered that the will form a positive contact with the periplieralwall of the housing 4 at whatever angle the blades may be resting withrespect to said wall thus insurinnr a substantially non-leaking )ointbetween these elements.

While the description and drawings illustrate in a general way certaininstrumentalities which may be employed in carrying the invention intoeffect, it is evident that many modifications may be made in the variousdetails, without departing from the scope ofthe appended claims, itbeing understood that the invention is not restricted to the particularexamples herein described, as it may be used as a positive blower forany required purposes.

I claim as my invention:

1. In a supercharger for motors, a housing havin outwardly offsetcircular channels in its si e walls concentric with the housing, a

spider eccentrically nidii'iit'ed :within said y housing, said spiderhaving one or more radiating grooves therein, blades longitudinallymovable in said grooves, cross bars extending transversely thru saidgrooves at the inner ends of said blades, each side edge of whichdescribes an arc of a circle and arcuate shoes at the ends of said crossbars adapted to enter and travel in said channels, whereb said crossbars will be moved .inwardly an outwardly as the spider is rotated.

2. In a su ercharger for motors, a housing, a pair ci) races set intothe side walls of the housing and concentricall therewith, a i

.spider rotatabl mounted wit in said housing and eocentrically to saidraces, said spider having radiating rrooves, a cross bar extendingtransversely t ru each groove, elon ated arcuate shoes integral witheach end o said cross bars tting and travelling in said races, saidshoes imparting sli ht rotating action to said cross bars as said s oestravel through said races, bladesslidable in said groves, and means forforming yielding contact between said blades and cross bars.l

' 3. In a supercharger forl motors, a rotating rounded whereby saidcross bars may have slight rotation in said grooves, shoes integral withthe ends of said bars, and means engaging said shoes for moving saidcross maaar@ bars inwardly and outwardly in said grooves.

4. In a supercharger for motors, a rotating spider having radial groovestherein, a. blade in each groove, a cross bar extending transverselythru each groove beneath the blade therein, means for moving said crossbars inwardly or outwardly in said grooves, one or more plungers carriedby each blade, the inner ends of which are pointed, and tapered recessesin the cross bars for receiving said pointed ends, and yieldin means formaintaining contact between saim plungers and cross bars.

5. In a supercharger for motors, a housing having circular channels inthe side walls thereof and concentric therewith, a spider mounted Withinsaid housinef and eccentrically to said channels, said spider havingradial grooves transversely therethrough, a. longitudinally movableblade in each groove, a bar passing transversely through each groovebetween the inner end of the groove and the inner end of the blade, theside edges of-said bar being curved and of such extent that some portionof said side surfaces will always contact with some portions of thewalls of said groove for receiving the drag stress against said bar andprevent the bar moving out of alignment with its coo erating blade,

and shoes at the ends of said ar adapted toy enter and travel in saidchannels and move the cooperating blade outwardly, said shoes impartingrotating action to said bar incident to their travel through saidchannels.

In testimony whereof, I have hereunto set i y hand on this the 5th dayof March, 1929,

OWEN H. SPENCER.

